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Journal of Applied Physics / Volume 107 / Issue 9 / PROCEEDINGS OF THE 11TH JOINT MMM-INTERMAG CONFERENCE, WASHINGTON, DC, 2010 / Critical Phenomena, Superconductivity, Correlated Systems, Electronic Structure

J. Appl. Phys. 107, 09E116 (2010); http://dx.doi.org/10.1063/1.3364062 (5 pages)

Diffraction line-shapes, Fermi surface nesting, and quantum criticality in antiferromagnetic chromium at high pressure (invited)

R. Jaramillo1, Yejun Feng2,3, and T. F. Rosenbaum3

1School of Engineering and Applied Science, Harvard University, Cambridge, Massachusetts 02138, USA
2The Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
3The James Franck Institute and Department of Physics, The University of Chicago, Chicago, Illinois 60637, USA

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(Received 27 October 2009; accepted 4 December 2009; published online 27 April 2010)

We explore the behavior of the nested bandstructure of chromium as a function of temperature and pressure to the point where magnetism disappears. X-ray diffraction measurements of the charge order parameter suggest that the nesting condition is maintained at high pressure, where the spin density wave ground state is destabilized by a continuous quantum phase transition. By comparing diffraction line-shapes measured throughout the temperature-pressure phase diagram we are able to identify and describe three regimes: thermal near-critical, weak coupling ground state, and quantum critical.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

antiferromagnetic materials, chromium, Fermi surface, ground states, high-pressure effects, magnetic transitions, spin density waves, X-ray diffraction

PACS

  • 75.50.Ee

    Antiferromagnetics

  • 75.30.Ds

    Spin waves

  • 62.50.-p

    High-pressure effects in solids and liquids

  • 71.18.+y

    Fermi surface: calculations and measurements; effective mass, g factor

  • 75.30.Kz

    Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3364062

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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